Zechariah said to the angel, "How can I be sure of this? For I am an old man, and my wife is old as well."

Then indeed you may be glad and dance for joy, for be sure that your reward in Heaven will be great; for that is what their ancestors did to the Prophets.

they went and woke him up. "Master, master," they cried, "we are drowning!" So he woke up and checked the wind and the surf; they ceased and there was a calm.

Even the very dust of your city which cleaveth on us, we do wipe off against you: notwithstanding, be ye sure of this, that the kingdom of God is come nigh to you.

Then an expert in the Law got up to test him and said, "Master, what must I do to make sure of eternal life?"

But if I cast out demons by the power of God, you may be sure the kingdom of God is come unto you:

But be sure of this, that if the master of the house had known what time the thief was coming, he would not have let his house be broken into.

And Jesus also said to the crowds, "When you see a cloud rising in the west, you immediately say, 'A rainstorm is coming up,' and sure enough, it does.

And when there is a south wind blowing, you say, 'It is going to be a scorching day,' and sure enough, it is.

Jesus said to his disciples, "Stumbling blocks are sure to come, but woe to the one through whom they come!

He also told the following parable to certain persons who were sure of their own goodness and looked down upon everybody else.

A member of the council asked him, "Good master, what must I do to make sure of eternal life?"

But whenever you see Jerusalem surrounded by armies, then be sure her desolation is not far away.

So, whenever you see all this happen, be sure the Reign of God is at hand.

And about an hour later someone else stated emphatically, "I know for sure that this man was also with him [i.e., Jesus], for he is from Galilee [too]." [Note: Peter's accent gave him away. See Matt. 26:73].